Coach Amor, who continues to fend off questions about his future at the club, will have to do without full-back Tarek Elrich, who ruptured the anterior cruciate ligament in his left knee against City, while Iacopo La Rocca and Marcelo Carrusca aren't registered for the ACL.

Ben Garuccio switched from the right wing to left-back to cover for Elrich on Friday and is likely to do so again in the ACL, while Taylor Regan and Kim Jae-sung could step into defence and midfield respectively for Amor's unavailable imports.

Jeju have their own selection concerns - midfielder Kwon Soon-hyung, who played all but one league match last season, is out with an ankle problem and left-back Chung Woon is in doubt with a thigh strain.

Lee Chang-min is the likely replacement for Kwon after he missed the weekend's 0-0 draw with FC Seoul through suspension.

Jeju had conceded just two goals in four games in all competitions before their six-goal thriller with Adelaide but any long-term concerns about Jeju's defence appear unfounded as they have conceded just once in three K League matches since.

Australian centre-back Aleksandar Jovanovic, who came on against Adelaide last time, didn't play against Seoul and could return for this continental clash.

The Reds have had a long trip to South Korea - they departed Melbourne early on Saturday morning and had to fly via China and Seoul - but McGowan insisted they will be ready.

"We've prepared all week and all season to [play] in the Champions League and to win games and this is what we plan to do," he said.